CS3 ScrollPane...uh...stupid?

[joshstrike]

I haven't had call before tonight to deal with the CS3 ScrollPane component, but I just assumed it would work like the AS2 component. And, uh...no.

In AS2 I always just built the MC I needed to be scrollable and then set it as the .content of the ScrollPane. So now SPs can only take URL data and you can't replace their content and invalidate them...? Is that right?! There's got to be a way of loading a Sprite into a ScrollPane that I'm just missing, right? Please tell me this isn't some nasty way of making people move over to Flex or I'm going to blow my mind out, I have about ten hours to get this code finished and didn't count on building my own scrollpane component...

[cancerinform]

This is all you need to write when you have a MovieClip in your library:
var myMC:Mc1 = new Mc1();
myScroll.source = myMC;

[illustratedlife]

cancerinform is right. Remember to add the component to your library first, though, or it won't compile.

[groovything.com]

how do i invalidate the scrollpane once the dynamic clip is loaded?

the problem is that even though the contents are larger than the scrollpane, the scrollbar is missing because the instance it loads, thereis nothing in the dynamic clip.

[groovything.com]

1. create class "glo.as":

package {
public class glo {
public static var movieLoaded:Boolean = false;
}
}

2. Import the class to the dynamic clip as well as the stage where the scrollpane is like:

import glo;

The above line assumes the as file is in the same directory as the fla file.

3. set the trigger in the dynamic clip(i put this after the loop that generates the thumbnails or whatever you are dynamically adding:
glo.movieLoaded = true;

4. put this code in the same frame where your scrollpane is:

addEventListener(Event.ENTER_FRAME, checkLoaded);
function checkLoaded(x)
{
var test = glo.movieLoaded;
if(test == true)
{
glo.movieLoaded = false;
completeHandler(x);
}
}
function completeHandler(event:Event):void
{
aSp.update();
}

[groovything.com]

I'm still wrestling with as3, but this does work very nicely for me.

the x in the function call(x) does nothing, but if I don't put something there I get errors.

If there is an easier way to do all of this, someone please post a better solution.

[illustratedlife]

Use Event.ADDED_TO_STAGE and you don't have to do that checkLoaded() stuff.

If I have a function I need to call from an event listener, but I don't use the event reference in the function, I do this:

function calledFromEventOrOtherFunction(... args)

... args will let the event listener pass event without causing an error, but will let you call the function with no arguments as well.

That said, you ought to do this for your last function:

function completeHandler(event:Event){
     if (event.target.parent is ScrollPane){
          ScrollPane(event.target.parent).update();
     }
}

That way, if you ever need to put that clip directly on the stage, you don't get errors about update not found.